煤炭转化2017，Vol.40Issue(3)：1-7,7.
不同类型酸作用下构造煤表面性的变化机理
Change Mechanism in Surface Properties of Treated Tectonic Coal by Different Acids
摘要
Abstract
The coal samples with different deformed degrees,collected from Huoerxinhe coalmine in Qinshui coal basin were treated by the different acids,including hydrochloric acid (HCl),acetic acid (HAc) and hydrofluoric acid (HF).Mass change rate and coal-water contact angel were measured,and the surface tension was calculated by low temperature ashing and X-ray diffraction methods.The results show that the mass change rate of the coal is about 0.1％ by HCl or HAc treatment,while the mass change rate of the coal is 7％ by HF treatment;the reaction objects are different for each acid,most of the minerals in the coal can react with HF,which is the most effective treatment method;after HCl treatment,the coal-water contact angel shows a obviously decreasing trend from 59.75°to 33.25°,but the surface tension increases from 54.42 mJ/m2 to 66.45 mJ/m2 to cause a stronger wettability.After HAc and HF treatment,the coal-water contact angel shows a correspondingly increasing phenomenon from 59.75° to 85.00°and 84.50°,the surface tension decreases from 54.42 mJ/m2 to 39.34 mJ/m2 and 39.65 mJ/m2 respectively.In general,the water-coal contact angel and surface tension of coal change significantly after the acid treatment.关键词
构造煤/酸处理/接触角/表面张力/润湿性Key words
tectonic coal/acid treatment/contact angel/surface tension/wettability分类
化学化工引用本文复制引用
张小东,余坤坤,张硕,杜志刚..不同类型酸作用下构造煤表面性的变化机理[J].煤炭转化,2017,40(3):1-7,7.基金项目
国家自然科学基金资助项目(41372162)和河南省高校科技创新团队支持计划项目(14IRTSTHN002). （41372162）
